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词汇 significant digit
释义 significant digit短语¹⁴⁴⁹⁷²⁺²
基本英英近义反义
有效数

Noun:
any digit of a number that is known with certainty; any digit of a number beginning with the leftmost non-zero digit and ending with the rightmost non-zero digit or a zero considered to be the exact value;

he calculated the answer to four significant figures

近义词 significant figure有效数
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